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Kinetics of denitrification using sulphur compounds: Effects of S/N ratio, endogenous and exogenous compounds

AutorCampos, J. L.; Carvalho, S.; Portela, Raquel ; Mosquera-Corral, A.; Méndez, R.
Palabras claveAutotrophic denitrification
Inhibition
Kinetics
Nitrate
Thiosulphate
Fecha de publicaciónmar-2008
EditorElsevier
CitaciónBioresource Technology 99(5): 1293-1299
ResumenThe influence of different sulphur to nitrogen (S/N) ratios on the specific autotrophic denitrification activity was studied in batch experiments using thiosulphate and nitrate as substrates. Transitory accumulations of nitrite were observed for assays with S/N ratios of 3.70 and 6.67 g/g, probably due to the higher specific reduction rate of nitrate compared to that of nitrite. Nitrite was the main end product when S/N ratios of 1.16 and 2.44 g/g were tested. The effects of endogenous and exogenous compounds (acetate and NaCl) on the specific denitrifying activity of the sludge were tested. Nitrite and sulphate did exert clear inhibitory effects over the process while thiosulphate, acetate and NaCl did not have strong effects at the concentrations tested. Similar experiments also showed that sulphur was not a suitable electron donor for these microorganisms, but sulphide was used successfully.
Versión del editorhttp://dx.doi.org/10.1016/j.biortech.2007.02.007
URIhttp://hdl.handle.net/10261/163238
DOI10.1016/j.biortech.2007.02.007
ISSN0960-8524
E-ISSN1873-2976
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